Maruti celerio doesnt even come in the picture. You can go as far as to compare the mighty Maruti Swift with the Tata Tiago. Tata Tiago is a very good product from Tata Motors but sadly Tata is still far from capitalizing on the success of the Tiago.
Tata needs to provide amt on both diesel and petrol Tata Tiago. I will buy a Tata Tiago diesel AMT anyday instead of the shitty back ignis.
Ultimately it is the capable combined attack of Maruti multiple hatchback and impeccable service network that has outsmarted all other companies. Hyundai with some foolish strategies of chucking safety features and 4 speed autobox and fuel efficiency figures will cost them dearly.
